<div class="pane">
  <div class="pane-wrapper">
    <div class="pane-header-wrapper">
    </div>
    <div class="pane-viewport">
      <div class="pane-content">
      </div>
    </div>
    <div class="pane-bar"
         ng-mousedown="startMoving($event)"
         ng-click="toggle()"></div>
  </div>
</div>
